package cn.tedu.work;

public class WorkDemo1 {
    public static void main(String[] args) {
        //科学计数法
        //31.5  3.15*10^1  3.15e1
        //0.051  5.1*10^-2  5.1e-2
//        double num = 31.5;
//        double num = 3.15e1;
//        System.out.println(num);
        //100 1*10^2   1e2
//        int num = 100;
//        double num = 1e2;
//        int num = (int)1e2;
//        System.out.println(num);
        //int->float
//        float f = -2;
        char c = 97;
        System.out.println(3+4+(1+2));//3+4=7+(1+2)  1+2=3  7+3=10
    }
}
